TCP报文解析

Question

tcp二进制报文解析

Answer 1

 static void Run()
        {
//"45 00 80 00 10 00 00 02 01 01 00 0D 66 86 00 00 00 00 00 00 FF FF 14 0E 03 1C 12 15 20 00 14 0E 03 1C 12 15 2E 00 1A AA A0 00 00 00 00 00 00 00 00 00 00 00 00 00 05 02 01 00 08 02 01 00 10 04 90 00 00 00 FF "
           
            string data =  File.ReadAllText("F:\\1.txt", Encoding.Default).Replace(" ", "");
            int result = 0;
            string output = string.Empty;
            byte[] array = new byte[1024];
            //string[] redata = data.Split(' ');
            //byte[] newb = new byte[redata.Length];
            //for (int i = 0; i < redata.Length; i++)
            //{
            //    if (i != 0)
            //    {
            //        Console.Write(" ");
            //    }            //    //将十进制转换成16进制Begin
            //    newb[i] =Convert.ToByte(redata[i], 16);
            //    //将十进制转换成16进制End            //    Console.Write(newb[i].ToString());
            //}
            for (int i = 0; i < data.Length; i=i+2)
            {
                string di = data.Substring(i, 2);
                for (int j = 0; j < 2; j++)
                {
                    string dj = di.Substring(j, 1);
                    #region
                    switch (dj)
                    {
                        case "a":
                        case "A":
                            {
                                result = result * 16 + 10; break;
                            }
                        case "B":
                        case "b":
                            {
                                result = result * 16 + 11; break;
                            }
                        case "C":
                        case "c":
                            {
                                result = result * 16 + 12; break;
                            }
                        case "D":
                        case "d":
                            {
                                result = result * 16 + 13; break;
                            }
                        case "E":
                        case "e":
                            {
                                result = result * 16 + 14; break;
                            }
                        case "F":
                        case "f":
                            {
                                result = result * 16 + 15; break;
                            }
                        default: {
                            result = result * 16 + (string.IsNullOrEmpty(dj.Trim()) ? 0 : Convert.ToInt32(dj));
                            break;
                        }
                    }
                    #endregion       
                }
                output += result.ToString()+"|";
                array[i] = Convert.ToByte(result);
                result = 0;
            }
            Console.WriteLine(output);
            Console.WriteLine(Encoding.Unicode.GetString(array));
            File.WriteAllBytes("F://2.txt", array);        }
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